“Trollhunters” is described as “a new, fantastical world wrapped around two best friends who make a startling discovery beneath their hometown.”

Discussing the project in 2010, Del Toro said, “I wanted very much to develop a story that could be written for kids but dealt with a genre that was scary… It essentially combines fairy tales with modern times and is about how difficult it is to be kid. Normally, kids are idealized in animated films. But the growing pains, married with the notion that there is a world right next to us that is completely plagued by creatures of ancient lore, it’s thematically fitting with the rest of my stuff.”